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JavaScript Reflect Complete Reference

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  • Last Updated : 11 Jan, 2023
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JavaScript Reflect is a built-in object. Like most objects in JavaScript, it is not a constructor.



Example: Below examples illustrate the Reflect.setPrototypeOf() method in JavaScript:


    const object1 = {};
    console.log(Reflect.setPrototypeOf(object1, Object.prototype));
    console.log(Reflect.setPrototypeOf(object1, null));
    const object2 = {};
    console.log(Reflect.setPrototypeOf(Object.freeze(object2), null));
    let object3 = {
    gfg() {
        return 'value';
    let obj = {
    geeks() {
        return 'answer';
    Object.setPrototypeOf(obj, object3);



The complete list of JavaScript Reflect are listed below:


JavaScript Reflect Method


apply()Call a function using the specified argument.
construct() It gives the added option to specify a different prototype.
defineProperty()Allow the precise addition to or modification of a property on an object. 
deleteProperty()Returns a Boolean value which indicates whether the property was successfully deleted.
get()This method always returns the value of the property.
getOwnPropertyDescriptor() Get the descriptor of an object.
getPrototypeOf()Return the prototype of the specified object.
has()Check whether the property exists in an object or not. It works like an operator as a function.
isExtensible()Check whether an object is extensible or not. 
ownKeys()Return an array of the target object’s own property keys and it ignores the inherited properties.
preventExtensions()Prevent the future extensions to the object which means prevent from adding new properties to the object.
set()Set the value of an object property.
setPrototypeOf()Set the prototype of a specified object to another object or to Null. 
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